Every woman's labor experience is unique, so it's difficult to predict exactly how long it will take for you to reach 5 cm dilation. However, based on your history of fast active labor, it's possible that you may progress quickly once contractions begin. On average, first-time mothers dilate at a rate of about 1 cm per hour during active labor. Since this is your third baby, your cervix may dilate more efficiently and at a faster pace. It's important to keep in mind that cervical dilation can vary greatly from person to person and even from pregnancy to pregnancy. Factors such as the strength and frequency of contractions, your body's response to them, and the position of the baby can all influence the speed of dilation. Given your previous experiences with "silent labor," where there are no noticeable signs until reaching 5 cm dilation, it would be wise for you to stay vigilant and prepared for sudden changes. If you live a good distance from the hospital, consider having a plan in place for when contractions start or if any other signs indicate that active labor has begun. This could include arranging transportation options or contacting your healthcare provider for guidance on when to head to the hospital. Remember to listen to your body and trust your instincts throughout this process. If you have any concerns or questions about your specific situation, don't hesitate to reach out to your healthcare provider for personalized advice and support.